Interface

• abstract class contains:

  • some implemented methods - die();
  • some unimplemented methods - talk();

• interface is all abstract

  • don't need to specify methods as abstract
  • no method implementation or fields allowed
  • just "interface", the exposed methods

interface Enumeration {

boolean hasMoreElements();

Object nextElement() throws NoSuchElementException;

}

class Permute implements Enumeration {

...

}

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